Rim-saw machine



(No Model.)

0.3. SILGOTT.

RIM SAW MACHINE.

No. 252,268. Patented-Jan. 10,1882; r

N. Pzrzas. Phnmumn n w, Washington. ac.

STATES Farce.

ATENT RIM-SAW MACHINE.

SPECIFICATION forming part of Letters Patent No. 252,268, dated January10, 1882.

Application filed April 18, 1881. (No model.) I

To all whom it may concern Be it known that I, OSCAR F. Snoorr, ofFelicity, Olermont count-y, State of Ohio, have invented certain new anduseful Improvements in Sawing-Machines, of which the following is aspecification.

The object of my invention is to provide a hand-power sawing-machine in.which a circu lar saw is employed, thereby gaining all the advantagesof a continuous cut; and the principal feature of my invention consistsin a saw of peculiar construction, together with certain novel means forsupporting and operating the Referring to the drawings forming part ofthis specification, Figure 1 is a side elevation of my invention. Fig. 2is a top viewof same. Fig. 3 is a sectionalview taken at the line .00 m,Fig. l; and Fig.4 is asectional view taken at the line y y, Fig. 1. u i

A is the saw, which consists of an annular strip of metal about thewidth of an ordinary crosscut-saw, and having the saw-teeth cut in itsouter circumference. This saw is supported, in a'manner to behereinafter described, in the frame A, which consists of two sidepieces, a a, shaped as shown. Between the rear ends of these piecesisplaced the block a. The purpose of this block is to separate the twoside pieces, a a, and also to form a solid body at the point where theframe A is attached to the supporting-frame of the machine. The sidepieces, a a, and the block a are securely fastened together,leaving aspace between said side pieces in front of said block, as shown.

The saw is supported in the frame A by a double system of. rollers. Therollers B B B extend across the space between the side pieces, a a, andturn in proper hearings in said side pieces. These rollers are placedwithin the circle formed by the saw, and are so situated as to preventthe saw from being displaced either up or down in its frame, the rollerB preventing the saw from downward displacement, and the two rollers Band B being placed below the line of the greatest diameter of thecircle, prevent the saw from being displaced upward. While the saw isthus prevented from upward or downward displacement, it is leftperfectlyfree to revolve around the rollers B, B,'and B The saw. is heldin the same vertical plane by the rollers b 12, located on either sideofthe saw, and between it and the side pieces, a a, and turning in properbearings attached to said side pieces. These rollersb b are made shortenough not to interfere with the teeth of the saw in its revolution.

The frame A is supported on the main-suppoiting-frame O by the bolt orshaft D, which passes through the body of the frame A, as

shown, and is journaled in appropriate bearings in the frame 0. On oneend of the shaft D is located the hand-wheel D, which latter turnsloosely on the shaft, but is held in position on the shaft by a pin, 01,or other appropriatemeans. This hand-wheel is provided with a suitablehandle,D On the inner face of this hand-wheel is a bevel-gear, extendingentirely around said wheel, which engages with the beveled pinion E.This pinion E is secured to the shaft E, which is journaled in boxes 0c; secured to the bodyof the frameA. This shaft Elies in the same planeas the shaft D, thelat-ter being provided with an enlarged portion,d,through which the shaft E passes,

. and in which itis free to turn.

Secured t0 the end of the shaft E, opposite the pinion E, is thefriction-wheel F.which bears against the saw A, an opening,f, in theside piece, a, permitting it toreach the saw. One

of the rollers,.b, is placed directly opposite this friction wheel F, sothat when the latter is caused to press against the saw this rollerbwillpresent a resistance, enabling the operator to cause this friction-wheelto bear against the saw to the desired extent. Any suitable device maybe employed for regulating the pressure of the friction-wheel F. In thepresent instance the journal-box e is provided with a set-screw, g, theend of which is free to turn in a half-collar resting against the shaftE. This half-collar may be tightened or loosened according as a greateror less amount of pressure of the friction-wheel F against the saw isrequired.

From the above construction it will be obvious that when the hand-wheelD is turned, the friction-wheel F having first been caused to pressagainst the saw,the saw willbe caused to revolve around the rollers B,B, and B and that the rollers b b will retain the saw inthe same planeof revolution.

The teeth of the saw may be so formed that the saw will cut in adirection away from the supporting-frame; or, if desired, they may be soformed that the saw will cut in an opposite direction -that is, towardthe supportingframe.

The saw-frame A turns freely with theshaft D withoutin any way affectingthe gearing by which the saw is operated, and it will therefore beevident that the saw will work equally well whether it be on top of thelog or in the position it will occupy when it has cut into the log. Inother words, any position of the sawframe A with reference to ahorizontal line will in nowise affect the working of the saw.

By the above-described construction thema- I chine may be made verylight, and 1 gain all the advantages of a continuous cutting action ofthe saw, by which means I am enabled to do much more rapid work than canbe done by crosscut-saws as now constructed.

It will be evident that the principles of my invention as abovedescribed may be employed in power saws with advantage by attaching abelt-pulley to the wheel D.

It will also be evident that the saw may be formed of two or moresections, the sections being firmly brazed together, which constructionwill render the manufacture of the saw cheaper than it would be if thesaw were made in one piece.

What I claim as new and of my invention, and desire to secure by LettersPatent, is-

1. The combination of the saw-supporting frame A, consisting ofthesegments a cog suitably connected and containing rollers, as B B B and bb,and the saw arranged to rotate between said segments, and the shaft D,connecting the supportingframe A to the main supporting-frame, andpermitting said frame A to turn on said shaft D, substantially as andfor the purposes specified.

2. The combination of saw-supporting frame A, consisting of the segmentsa a, suitably connected, and containing rollers, as B B B and as b b,and the saw arranged to rotate between said segments and carrying theboxes 0 e, and the shaft E,journaled in said boxes, and

provided with friction-wheel F, and the geared wheel and its shaft D,whereby the saw-supporting frame A is hinged to the mainsupporting-frame,substantially as and for the pn r-' poses specified.

3. In asawi'ng-machine, the combination or the saw-frame A, hinged tothe supporting,- frame 0 by shaft D, carrying the operating hand orpower wheel D, shaft E, supported in bearings 00, carryingfriction-wheel F, and pinion'E, engaging a, gear on wheel D, and saw Aandanti-frictiou rollers, as b I), preventing its lateral displacement,and anti-friction rollers, as B B B preventing displacement in thedirection of its operating plane, substantially as and for the purposesspecified.

OSCAR F. SILCOTT'.

Witnesses:

W. F. GOODWIN, E. A. KNOWLES.

